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Verified sending domains are now mandatory
- Friday, 8th May, 2026
- 11:37am
This change affects users of our BoltMail email marketing platform. We are now requiring a verified sending domain for all email campaigns. Verified sending domains prevent email spoofing and are required when sending bulk email to all major ESPs including Google, Microsoft and Yahoo. Up until now we had been strongly encouraging the use of verified sending domains and for over 5 years we have been displaying an orange warning message when creating campaigns without a verified domain.
Major ESPs are now enforcing email verification for bulk senders so we must enforce this requirement to prevent your emails from being rejected or delivered directly to spam folders.
We have brought this forward because Microsoft have this month implemented enforcement of this requirement.
If you are not yet using a verified sending domain you need to take action now.
For more information please see: Creating a sending domain
If you need assistance configuring your sending domain please open a support ticket and ask for help. Email [email protected]
